Study on the cycle performance of salt solution-storage-based heat pump

被引：0
|
作者：
Chang M. [1 ]
Wang L. [1 ]
Yuan J. [1 ]
Cao Y. [1 ]
机构：
[1] Institute of Building Energy and Thermal Science, Henan University of Science and Technology, Henan, Luoyang
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷
关键词：
coefficient of performance; economy; energy storage; heat pump; salt solution; thermodynamics;
D O I：
10.11949/0438-1157.20221620
中图分类号：
学科分类号：
摘要：
In order to solve the problem of electricity demand peak and valley in heating period, a solution-based energy-stored heat pump (SEHP) is proposed, which is composed of compression heat pump subsystem and salt solution subsystem with energy storage and release to realize thermal storage and thermal grade improvement. The multi-layer liquid storage units are used to optimize the design of salt solution storage tank to improve the energy storage density. Based on the thermodynamic model of the new cycle, the effect of key operating parameters on the performance of SEHP are studied, and its economy makes comparisons with that of the air-source energy-stored heat pump (AEHP) and the air-source heat pump (ASHP). The results show that the comprehensive heating coefficient of performance (CCOP) of the new cycle is lower than that of AEHP and ASHP, but its energy storage density (ESD) and economy are better than those of the two conventional heat pumps. At 300 kW heating load, although CCOP of SEHP is 4.76% lower than that of AEHP, ESD of SEHP is 2.2 times higher than that of AEHP, while the annual cost of AEHP is 1.46% and 29.00% lower than that of AEHP and ASHP respectively. © 2023 Chemical Industry Press. All rights reserved.
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页码：329 / 337
页数：8
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